Change-speed gear



Dec, 28 i926. $612358 R. MATTEUCC! CHANGE SPEED GEAR Filed y 28' 1925 m 2 ZWMQ/J/zw wf/aarc/ ltetented lfiild.

retrial? ename s-sans!) saan.

Application filed May28, 1925, Serial The present invention has for its object a change speed gear for motor vehicles comprising in combination a roller planetary speed reducing: gear operating by positive action of adhesion and a change speed gear, and in which a driven shaft is permanently connected with the roller-carrier of said planetary gear and said gear is driven by" a driving shaft either directly or through the intermediate of said change speed gear which actuates the movable rim of said planetary gear, in order to obtain a number of. different speed ratios for said driven Onthe annexed drawing is illustrated by way of example, as an embodiment of the present invention, a change speed gear with four speeds and reverse according to the present invention. and

Figure 1 is alongitndinal section of the same on a plane passing through the axes of the driving and driven shat'ts;

Figure 2 is a, transverse'section on line 2-2 of Figure 1 and Figure 3 is a fragmentary 3-3 of Figure 1.

In said figures, 1 is a casing divided in chambers 2' and 3 by an intermediate partition t and in said casing 1 are mounted a driving shaft 5, a driven shaft 6 and a countershaft Y by means of ball bearings all).

In the construction illustrated. the driving shaft 5 and the driven shaft 6 are held in aligned position by means of an extension 6' of driven shaft which extension is seated in a bushing 8 located in acentral recess of the shaft 5, but of course said shafts may be mounted in any other suitable manner.

The driven shaft 6 is solid in rotation with a roller-carrier 9 oi" a planetary gear section on line comprising rollers 10 running on the outer surface of a stationary split and self-expansible rim 11, and onthe internal surface of a rim 12. r

The rim 11 is mounted, by the intermediate ofpositioning rollers 37-, on a stationary huh 88solid with casing" 1, and a wedge 39 engaged in slots 11 and 42 of said rim and hub provides for adjusting the expansion of said split rim? A sleeve 16 which is supported in thecasing 1 by means of hearings 3i andfioarranged in partitions and l3 of casing 11, is solid in rotation with the rotary rim 12 it said planetrry gear by means ot a toothed flange .removably engage either teeth m. 33,521, and in Italy June a, was.

which engages a toothed sleeve 14: provided on the flange 13 of said rim 12.

By the described arangement said. planetary gear may be easily detached from other parts of the gear by withdrawing said sleeve 14 from toothed flange 15.

Within said hollow sleeve 16 is arranged a sleeve 17 which is solid in rotation with the driving shaft 5 and is adapted to slide longitudinally along it under the control. of a fork member, not shown, engaging a collar 18 provided at one end of said sleeve 17; the other end of sleeve 17 has teeth 19 adapted to 20 of said roller carrier 9 or teeth 21 of the outer sleeve 16.

Therefore by an endwise displacement of said sleeve 17 the driving shaft 5 may be connected directly either with the roller carrier- 9 or with the rim 12 of the planetary gear, this rim being solid in rotation with the sleeve 16 by means of parts 13-1415 as above described. I i The sleeve 16 has ferent diameters connected with it in rotation but loose longitudinally thereov said pinions being adapted to mesh respees ively with pinions 24 and 25 carried by countershatt 7 which is arranged in the space he tween the partition 4 and the casing front wall 4 1, said countershat't carrying a pinion 26 solid with it and in permanent mesh with a pinion 27 solid with the shaft 5. On a stationary side stud 28 ed an idle pinion 29 adapted to beshiftet endwise to mesh with pinions-24. and 22 in order to provide for reverse rnnni g, said pinion having a longitudinal size or thickness adapter. to mesh with both pinions 24 and 22 at the same time when they are out of mesh with and at the side of each other.

The operation of the gear-is as follows In the conditions shown onth drawing the driven shaft is at rest while the drivin shaft is being actuated, teeth 19 of sleeve 1 solid with driving shaft 5 being released from both teeth 21 and 20 and pinions 22-23 and 29 being out of mesh with cooperating ones.

The first or lowest speed is obtained by leaving teeth 19 of sleeve 17 released from teeth 20 and 21 and by carrying pinion. 22 in mesh with pinion 24;; then the drive is transmitted from shaft 5, pinions 21-26, count-ershatt 7 pini0ns'2 r-22., sleeve 16., to rim 12 of the planetary gear the driven pinions 22 and 23 of difsee Figure 2) ismountto pinions 24: and and sleeve 17 is moved by its collar 18 so as to engage its teeth 19 with the 21. The driving shaft is thus caused to directly actuate the rotary rim 12 of the planetary. gear, While the driven shaft ll is actuated by roller carrier 9 hi the lZZlEILSIfilSSlOXl ratio 01 the planetary.

, driven shaft 6;

end 24;

e 29. pinion 2-2,

gear. Direct drive obtained by shifting; sleeve 1'? to i teeth 19 with teeth 20 of the roller carrier 9 which is integral with the driven shaft 6 is then operated direct r by the driving shaft 5 While the several pinions and the planetary gear run idle.

Finally the reverse drive is olzteined by cerryin pinion 25) in D'IGSll'Wllli pinions 2:2 iich are at the side 01" each other While said pinion 29 is adapted. to mesh with both oi them at the some time.

The reverse drive is thenohteined as follows :-.-driving shaft 5, pinious 27-26, countershntt '2'. pinion 4, reversing idle pinion sleeve 16, planetary rim 12 and roller carrier 9, the driven shell 6 being solid with this last member.

The pinions 22229 are of course controlled by any suitable or conventional device. well known in change speed gears.

The arrows marked 1. ll, I -l. EV, and t on the drawingshow the positions of the pinions and other parts for obtaining the several operative conditions above described.

The described construction provides :1 change speed by which the direct drive and drives under reduced speed ratios is ts .he olu'nincrl. the number of :iveiluhlc ratios depending upon the nmnhcr of pairs of pinions by which the drive may be imported to the rotary rim 22 of the planetary gear.

The use of :1 planetary gear in the (lescrihecl arrangement provides the best possilole conditions for operation and maintenance hccnuse said planetary gear is subject to l'nexinlum stress when it operates for drive with lowest speed and reverse. that is in respect of conditions which are not usually operative in motor car practice. While the stresses are reduced in respect of second speed and are further reduced to a minimum in respect oi third speed which is operated to a large extent in road vehicles,

because in this condition the rim 12 is driven directly the driving shaft and. ectnetes and driven shaft, I r with sa d rotary ewis's;

under a reduced ratio the roller carrier 9 and shaft 6. I

Finally in direct drive the rim 12 is ro tilted with high speed and thus operates as fly wheel. its ztl'lrlllfltlllflll hcin g such as to l'illiO advantage of the well known op erative advantages ol roller planetary gears for the purpo:-c of dumping vibrations and shocks occurring in the gear. r

The change speed gear comprising pinions 22Qil-2l---25--:262l'-:2$l could he replaced hy u change speed gen r of a different construction because it is merely intended to alter the ratio of speed imparted to rim 12 ot' the planetary gear. The describedcousti'uction is the preferred one because the sleeve 16 and countcrshalt 7' are very short and pinions 22-23-7242526 are located at the ends of respective shafts and therefore they are in close proximity with respect to shaft hearings.

Further the errengement ot the planetary gear .on the rear ofthe partition i of the casing 1 and separate 'vvith respect to other members provides n free space for the said planetary gear Without obstruction by the countershaft 7.

The provision of an annular chamber 3% confined by an inwardly projecting edge or shield 30 is directed to prevent fragments 7 a disc 31. preferably having blades 32n10ving adjacent the flange 13 of the it. i; y rim 12 and dipping in oil contained in casing 1, said flange 13 having: ports to provide for the flow into the gear of the oil collected by said blades 32 and projected under centrifugal action on the flange 13.

The described gear is compact and light and further it produces no noise owing; to the use or a roller-planetary gear and to the comparativel large size which may he imparted to pinions in view of the described arrangement.

hat I claim as My invention and desire to secure by United States Letters Petcnt is 1. A change speed gear-for road vehicles comprising e planetery gear consisting; of a stationary rim, e concentric roteryriin, intermediate satellite rollers and a rotary can rier for said rollers; 21 driven shaft solid with said carrier, a driving shaft, speed change means. and means for selectively connecting said driving shaft rlirectlywith said carrier rim either directly or tnrough the intermediate of said speed change means.

lOS

52. A change speed gear for road vehicles comprising a planetary gear consisting of e stationery rim, a concentric rotary rim, intermediate satellite rollers and arotary carrier for said rollers; a driven shaft solid with said carrier, :1 driving shaft concentric with said carrier and driven shaft, speed charms means, a clutching member adapted connect saiddriving shaft with said carrier and driven shaft or with said rotary rim end means for selectively connecting said driving shaft with said rotary rim through intermediate of said speed change means.

3. A change speed gear for road vehicles, comprising ,a, planetary gear consisting of a stationary rim, a concentric rotary rim, intermediate satellite rollers and a rotary carrier for said rollers; a driven shaft solid with said carrier, 'a driving shaft, clutching means for connecting selectively said driving shaft with said rotary rim or with said carricr and driven shaft, a maniac solid with said rotary rim, pinions on said member, a countcrshaft driven by said driving shaft, pinions on said countersliaft, the said first named pinions and said counter-shaft pinions being adapted to be carried in mesh with each other, and means for cortrolling said member and pinions.

change speed gear for road vehicles comprising 2i casing, means providing compertments said casing; e planetary gear in said compartments, said planetary 53122,? corrorising a stationary rim, :1 concentric ro' rim, intermediate satellite rollers on a rotary carrier for said rollers; a driven elicit solid with said carrier, a driving shaft,

change means and means for selectively said driving'shaft directly sell carrier driven shaft, or with said rot'-'ry rim either directly or through the inter-medicare said speed change means,

said sceed clienge means heing located in. fliz'wiiliel compartment of said casing with respect to first named compartment.

5. A speed gear for road vehicles, comprising planetary gear consisting of e etetioriery rim. a concentric rotary rim, intermediate 'satellite rollers and a rotary carrier for said rollers, a driven shaft solid with said carrier, a driving shaft, clutching means for selectively ccnneeting'said driving shaft with said rotary rim or with said carrier and driven shaft, a sleeve encircling said driving shaft, means on said sleeve and planetary rotary rim for making them removably solid with each other, pinions on said sleeve, a countershaft driven by said driving shaft, pinions on said ccuntersliaft, the said first named pinions and said countershaft pinions being adapted to be carried in mesh with each otlien and means for controlling said sleeve and'pinions.

8. A change speed gear for road vehicles comprising a-planetary gear consisting of a stationary rim, a concentric rotary rim, intermediete satellite rollers and a rotary carrier for said rollers, a driven shaft solid with said carrieiy-c driving shaft concentric with said carrier and driven shettfspeed change means, a clutching member adapted to connect said driving shaft with said carrier and driven shaft orwith said rotary rim, an annular shield encircling said clutching member, and means for selectively connecting" said driving shaft with said rotary rim through the intermediate of said speed change means.

7. A change speed gear for road vehicles comprising a planetary gear consisting oil a stationary rim, a concentric rotary rim, intermediate satellite rollers and a rotary carrier for said rollers; a driven shaft solid with said carrier, 2 driving shaft, speed change means, and. meansfor selectivelyconnectin said driving shaft directly with. said carrier and driven shaft, or with said rotary rim either directly or through the intermediate of said speed change means. a casing encicling the above named parts and a disc driven by one off-said shafts, seid disc dipping; in oil contained in said casing and having its rim adjacent to said planetary gear "to supply 'oil to the same.

I In testimony whereof I have si med my name to this specification.

RAFFAELE MATTEUCCI. 

